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UPSD325X датащи(PDF) 155 Page - STMicroelectronics

номер детали UPSD325X
подробное описание детали  Flash Programmable System Devices with 8032 Microcontroller Core and 256Kbit SRAM
PDF  176 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UPSD325X датащи(HTML) 155 Page - STMicroelectronics

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µPSD325X DEVICES
Table 118. External Data Memory AC Characteristics (with the 5V MCU Module)
Note: 1. Conditions (in addition to those in Table 109, VCC = 4.5 to 5.5V): VSS = 0V; CL for Port 0, ALE and PSEN output is 100pF; CL for
other outputs is 80pF
Symbol
Parameter1
40MHz Oscillator
Variable Oscillator
1/tCLCL = 24 to 40MHz
Unit
Min
Max
Min
Max
tRLRH
RD pulse width
120
6tCLCL – 30
ns
tWLWH
WR pulse width
120
6tCLCL – 30
ns
tLLAX2
Address hold after ALE
10
tCLCL – 15
ns
tRHDX
RD to valid data in
75
5tCLCL – 50
ns
tRHDX
Data hold after RD
00
ns
tRHDZ
Data float after RD
38
2tCLCL – 12
ns
tLLDV
ALE to valid data in
150
8tCLCL – 50
ns
tAVDV
Address to valid data in
150
9tCLCL – 75
ns
tLLWL
ALE to WR or RD
60
90
3tCLCL – 15
tCLCL + 15
ns
tAVWL
Address valid to WR or RD
70
4tCLCL – 30
ns
tWHLH
WR or RD High to ALE High
10
40
tCLCL – 15
tCLCL + 15
ns
tQVWX
Data valid to WR transition
5
tCLCL – 20
ns
tQVWH
Data set-up before WR
125
7tCLCL – 50
ns
tWHQX
Data hold after WR
5
tCLCL – 20
ns
tRLAZ
Address float after RD
00
ns



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